Process of manufacturing cement.



G. DAHER. PROCESS OF MANUFACTURING GEMENT.

APPLICATION FILED MAY 6, 190B.

Patented Sept. 26, 1911.

UNITED STATES PATENT OFFICE.

CHARLES IDAHER, OF MARSEILLE, FRANCE, ASSIGNOR TO THE SOGIETE J. ET A. PAVIN DE LAIARGE, OF VIVIERS, FRANCE, A CORPORATION OF FRANCE.

PROCESS OF MANUFACTURING CEMENT.

Specification of Letters Patent.

Application filed May 5, 1909. Serial No. 494,108.

i citizen of the French'Republic, residing at Marseille, Department of the Bouches du 'Rhone, in France, have invented certain new and useful Improvements in Processes of Manufacturing Cement; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention has for its object a process for the manufacture of cement consisting in utilizing the slag delivered from blast furnaces at the moment at which it leaves the furnaces. In order to bring this slag into a sufiiciently hydraulic condition, it must be of a comripsition corresponding approximately wit the formula:

ment.

In the accompanying drawings: Fi ure 1 shows schematically an apparatus a apted for use in carrying out the invention. Fig. 2 shows a modified detail.

1 represents (Fig. 1) the blast furnace in which the sla is formed. At the lower part of the blast rnace 1, the slag is collected in a conduit 2 and conducted to a furnace 3 which maybe of any convenient type and wherein the lime, alumina and iron which are required in order to obtain the chemical composition of the slag are added. All the materials enter this furnace in the state of fusion; they are then run into a granulation conduit 4. The front part of this conduit is provided with a pipe 5 through which a very powerful water jet is admitted.

Behind the conduit 4 a rotary drum 6 is arranged for eliminating the water. On leaving this drum the slag falls into a rotary drier 7 which is heated, pr ferably in utilizing the waste heat. On leaving the drier 7 the slag is collected in a tank 8 and should be reduced by trituration to a finely powdered condition like ordinary cement.

The installation described above (apparatus 4, 5. 6, 7) may be replaced by a cylinder granulator represented schematically in 9 Fig. 2, and cooled by a water current.

I claim:

1. A process for manufacturing cement, which comprises producing a quantity of fluid slag in a blast furnace, mixing such Patented Sept. 26, 1911.

slag while still fluid with lime and alumip nous material in order to produce a mixture corresponding approximately to and then granulating and drying the mixand then granulating and drying the mixture so formed, the materials combined with the slag being mixed therewith while in a state of fusion.

In testimony whereof I affix my signature, in presence of two witnesses.

CHARLES DAI'IER. Witnesses:

Youssour. Fun, I PAUI: DAHER. 

